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diff --git a/src/leap/mail/imap/interfaces.py b/src/leap/mail/imap/interfaces.py
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+++ b/src/leap/mail/imap/interfaces.py
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+# -*- coding: utf-8 -*-
+# interfaces.py
+# Copyright (C) 2014 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+Interfaces for the IMAP module.
+"""
+from zope.interface import Interface, Attribute
+
+
+class IMessageContainer(Interface):
+    """
+    I am a container around the different documents that a message
+    is split into.
+    """
+    fdoc = Attribute('The flags document for this message, if any.')
+    hdoc = Attribute('The headers document for this message, if any.')
+    cdocs = Attribute('The dict of content documents for this message, '
+                      'if any.')
+
+    def walk(self):
+        """
+        Return an iterator to the docs for all the parts.
+
+        :rtype: iterator
+        """
+
+
+class IMessageStore(Interface):
+    """
+    I represent a generic storage for LEAP Messages.
+    """
+
+    def create_message(self, mbox, uid, message):
+        """
+        Put the passed message into this IMessageStore.
+
+        :param mbox: the mbox this message belongs.
+        :param uid: the UID that identifies this message in this mailbox.
+        :param message: a IMessageContainer implementor.
+        """
+
+    def put_message(self, mbox, uid, message):
+        """
+        Put the passed message into this IMessageStore.
+
+        :param mbox: the mbox this message belongs.
+        :param uid: the UID that identifies this message in this mailbox.
+        :param message: a IMessageContainer implementor.
+        """
+
+    def remove_message(self, mbox, uid):
+        """
+        Remove the given message from this IMessageStore.
+
+        :param mbox: the mbox this message belongs.
+        :param uid: the UID that identifies this message in this mailbox.
+        """
+
+    def get_message(self, mbox, uid):
+        """
+        Get a IMessageContainer for the given mbox and uid combination.
+
+        :param mbox: the mbox this message belongs.
+        :param uid: the UID that identifies this message in this mailbox.
+        :return: IMessageContainer
+        """
+
+
+class IMessageStoreWriter(Interface):
+    """
+    I represent a storage that is able to write its contents to another
+    different IMessageStore.
+    """
+
+    def write_messages(self, store):
+        """
+        Write the documents in this IMessageStore to a different
+        storage. Usually this will be done from a MemoryStorage to a DbStorage.
+
+        :param store: another IMessageStore implementor.
+        """